JP4969877B2 - Chair - Google Patents

Description

  The present invention relates to a chair mainly used in a theater or the like.

  Conventionally, the back portion of a chair used in a theater or the like has a frame made of a metal pipe material P as shown in FIG. 12, and a spring, a cushion body and a skin material are attached to the frame. The thing etc. which were supported by the part are known (refer patent document 1).

In addition, as a structure for locking the skin material to the dorsal part, a plurality of engagement holes are provided in the peripheral part of the skin material, and the engagement holes of the skin material are fitted into the plurality of hook-shaped claws provided in the back part. And the like that are locked are known (see Patent Document 2).
Japanese Utility Model Publication No. 5-53561 JP-A-10-211061

  However, in the dorsal part where the frame is composed only of metal pipe material, the load is received only by the metal pipe material, so when the user is seated, the dorsal part feels hard and sits down. There was a problem of being uncomfortable. Furthermore, the conventional chair has a large number of parts, and there are many joints that are bonded and fixed. Therefore, there is a problem that it takes time to replace and recycle parts such as assembly work and repair.

  Further, when the skin material is locked to the dorsal fin portion, the conventional locking structure requires a process of providing an engagement hole in the skin material, and there is a problem that it takes time and effort.

  The present invention has been made in view of the above circumstances, and by changing the configuration of the back portion, it is possible to improve the sitting comfort when the user is seated, as well as assembly work, repair, etc. The purpose is to propose a chair that does not require much trouble when replacing and recycling parts.

  Another object of the present invention is to propose a chair that does not require much trouble at the time of manufacture by changing the locking structure between the back portion and the skin material, thereby simplifying the processing method of the skin material.

In the chair according to the present invention, the back portion supported by the leg portion is divided into a resin back inner shell and a resin back shell, and a reinforcing body is detachable around the back shell. It is attached, The lower part of this reinforcement body is attached to the said leg part so that attachment or detachment is possible , The said reinforcement body consists of metal pipe materials, and the headrest shell is integrally molded by the said back inner shell, It is characterized by the above-mentioned.

According to the present invention, the load that has been received only by the frame made of a metal pipe material until now will be received by the reinforcing body and the back shell made of resin. When securing this, it becomes possible to increase the amount of deflection of the back portion. As a result, the sitting comfort can be improved when the user is seated.
In addition, by adopting a configuration in which each part can be easily attached and detached, it is possible to improve work efficiency in parts replacement such as assembly work and repair. Furthermore, since each component is configured to be detachable, it can be easily disassembled for each component, and separation processing can be performed without trouble even when recycling.

In addition, since the reinforcing body can be manufactured only by simple processing of the pipe material, it is possible to increase the efficiency of the work and to easily ensure the load resistance.
Furthermore, since the load resistance can be adjusted only by changing the plate thickness and the processing shape of the metal pipe material, various variations can be easily set.

In addition, the number of parts can be reduced, so that labor is not required at the time of parts manufacture, assembly work, and recycling, and labor saving can be achieved.

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the chair A includes a leg portion 1, a seat portion 2, an armrest portion 3, and a backrest portion 4. Moreover, the back collar part 4 is comprised from the back inner shell 4a, the back back shell 4b, the reinforcement body 4c, the cushion body 4d, and the skin material 4e.

  The leg portion 1 and the seat portion 2 are rotatably supported via a shaft body 5, and the upper surface of the seat portion 2 is disposed between the leg portion 1 and the seat portion 2 in the direction of the backrest portion 4. An elastic member (not shown) for biasing is provided. The leg 1 and the elbow rest 3 are fixed by screws. As shown in FIG. 3, the leg portion 1 and the dorsal fin portion 4 are fixed by screws B between the leg portions 1 and the reinforcing body 4 c via a fixing plate 6 having an L-shaped cross section. Moreover, the leg part 1 and the back back shell 4b are joined via the reinforcement body 4c.

  As shown in FIG. 4, the back inner shell 4 a is a rectangular resin member (made of polypropylene), and includes a plate-like headrest shell 7 provided at the top. A locking hole 8 for fitting with the back shell 4b is formed at the base of the headrest shell 7 (see FIG. 7). Locking portions 9 for locking with the back shell 4b are provided on both sides of the central portion in the vertical direction of the back inner shell 4a. Moreover, the latching | locking part 10 for latching with the skin material 4e is provided in the circumference | surroundings of the back inner shell 4a. A part of the lower edge of the back inner shell 4a protrudes, and a hole 11 for screwing with the back shell 4b is formed here.

  As shown in FIGS. 5 to 8, the back shell 4 b is a rectangular member molded from resin (made of polypropylene) like the back inner shell 4 a, and the back inner shell 4 a is locked to the upper edge thereof. A locking portion 12 for fitting with the hole 8 is provided. Moreover, the latching | locking part 13 for latching with the latching | locking part 9 of the back inner shell 4a is provided in the both sides of the up-down direction center part of the back back shell 4b. Since the back inner shell 4a is locked from above, it is desirable that the locking portion 13 has a shape reinforced with a cylindrical projection or the like (not shown). A screw hole 14 for screwing the hole 11 of the back inner shell 4a is formed in the lower part of the back shell 4b.

  Here, a reinforcing body 4c formed by molding a metal square pipe material into a U-shape is detachably attached to the back shell 4b. Specifically, the presser plate 15 is provided in the width direction on the upper portion of the back shell 4 b, and the reinforcing body 4 c is held on the back side of the presser plate 15. Further, nut attachment holes 16 for attaching the fixing plate 6 having a L-shaped cross section and the reinforcing body 4c are formed on both lower sides of the back shell 4b.

The fixing plate 6 is made of metal, and screw B mounting holes are provided on each surface. Here, the fixing plate 6 and the leg 1 are engraved with a female screw for screwing the screw B into the inner periphery of the mounting hole of the fixing plate 6, and the screw B is fixed to the leg 1. The screw B is screwed into the mounting hole of the fixing plate 6 and the hole of the leg 1 to be supported and fixed.
Next, the joining of the fixing plate 6 and the back shell 4b and the method of supporting and fixing the fixing plate 6 and the reinforcing body 4c will be described in detail.
As shown in FIGS. 3A and 3B, mounting holes 21 and 22 are formed in the fixing plate 6, and the surface of the reinforcing body 4 c corresponds to the mounting holes 21 and 22 of the fixing plate 6. Mounting holes 23 and 24 are formed at the positions. A hole 26 into which the seated cylindrical nut 25 can be inserted is formed on the back surface of the reinforcing body 4 c at a position corresponding to the mounting hole 23, and a cylindrical nut 27 is formed at a position corresponding to the mounting hole 24. A hole 28 through which can be inserted is formed. Here, the seat portion 30 of the cylindrical nut 25 with a seat and the folded portion 31 of the nut mounting hole 16 of the back shell 4b are configured to be engaged with each other.
A seated cylindrical nut 25 having a female thread engraved on the inner periphery is inserted into the nut mounting hole 16 of the back shell 4b and the hole 26 of the reinforcing body 4c from the outer surface of the back shell 4b, and the mounting hole of the fixing plate 6 is inserted. The back shell 4b and the fixing plate 6 are joined by screwing the screw B and the seated cylindrical nut 25 inserted through the fixing hole 21 and the mounting hole 23 of the reinforcing body 4c from the fixing plate 6 side. .
Next, a cylindrical nut 27 in which a female screw is engraved on the inner periphery is inserted from the hole 28 of the reinforcing body 4 c, the end of the cylindrical nut 27 and the peripheral edge of the hole 28 are welded, and the fixing plate 6 is attached. By screwing the screw B and the cylindrical nut 27 inserted into the hole 22 and the mounting hole 24 of the reinforcing body 4c from the fixing plate 6 side, the reinforcing plate 4c and the fixing plate 6 are firmly supported and fixed. Become.

A cushion body 4d is bonded to the back inner shell 4a so as to cover the whole, and a skin material 4e covering the cushion body 4d is further attached (see FIGS. 1 and 2). Specifically, it demonstrates based on FIGS. As shown in FIG. 9, the skin material 4 e is composed of an upper material 17 made of cloth or the like and a resin hook 18 having a U-shaped cross section sewn to the end of the upper material 17. The upper covering material 17 has a size that covers the back inner shell 4a from the front surface and can be attached to the back inner shell 4a by being wrapped around the back inner shell 4a.
A cushion body 4d made of urethane foam is bonded to the back inner shell 4a with an adhesive, and a skin material 4e is covered so as to cover the cushion body 4d.
Here, the cushion body 4d has a portion corresponding to the front surface of the back inner shell 4a including the headrest shell 7 with a predetermined thickness to ensure appropriate cushion performance.

  As shown in FIG. 10, the skin material 4e is wound around from the front surface of the back inner shell 4a to the back surface, and the hook 18 provided on the peripheral portion of the upper covering member 17 is engaged with the engaging portion 10 on the back surface of the back inner shell 4a. By stopping, the skin material 4e is attached to the back inner shell 4a.

  Therefore, when attaching the back inner shell 4a, which has been completely covered with the skin material 4e, to the back shell 4b, the reinforcing body 4c is attached in advance, and the leg 1 is supported and fixed via the reinforcing body 4c and the fixing plate 6. The engaging hole 8 of the back inner shell 4a is fitted into the engaging portion 12 of the back back shell 4b, and the engaging portion 9 of the back inner shell 4a is engaged with the engaging portion 13 of the back back shell 4b. . After that, screws are fixed using the holes 11 of the back inner shell 4a and the screw holes 14 of the back shell, and both are fixed. Here, as shown in FIG. 8, the shape of the locking portion 12 is a little saddle-shaped so that it is possible to prevent the back inner shell 4a and the back shell 4b from coming off easily due to impact. .

  In the present embodiment, the back inner shell 4a and the back shell 4b are made of polypropylene that is environmentally friendly, has high thermoplasticity, and can be easily molded. Therefore, chairs of different types such as the back portion 4 can be easily manufactured by changing the molding. In addition, one side (outside) of the back shell 4b is exposed during normal use, but using a resin material made of polypropylene makes it easy to produce various colors without painting. It becomes possible to select. In addition, although a load is applied to the joint between the leg 1 and the back shell 4b, polypropylene is a material suitable for the present invention because of its characteristic that it has bending strength.

  Since the reinforcing body 4c uses a metal square pipe material, it has a hollow shape that is advantageous in terms of strength, and can be cut and bent by simple processing. Therefore, the reinforcing body 4c can be manufactured inexpensively and easily. As a result, the load resistance can be secured easily and inexpensively without going through a complicated process, and the work efficiency can be improved. Furthermore, since the load resistance can be adjusted only by changing the plate thickness and the processing shape of the metal pipe material, various variations can be easily set.

  In the present embodiment, since the load is received by the reinforcing body 4c and the back shell 4b, the load is received only by a frame made of a metal pipe material like a conventional chair. When the equivalent load resistance is ensured, the load can be distributed to the reinforcing body 4c and the back shell 4b. As a result, since the resin material is provided in part, the amount of deflection can be increased as compared with the conventional case, and the sitting comfort of the user can be improved. In addition, when the strength of the reinforcing body 4c is set to the same strength as that of a frame made of a conventional metal pipe material, the load resistance of the dorsal part 4 is increased by the addition of the back shell 4b. can do.

The headrest is configured such that the headrest shell 7 is covered with the cushion body 4d and the skin material 4e, the headrest shell 7 is made of resin, and is located outside the range of the reinforcing effect by the reinforcing body 4c. The amount of deflection can be ensured, and the sitting comfort of the user can be improved.
Further, in this embodiment, the headrest shell 7 is integrally formed with the back inner shell 4a, so that the number of parts is reduced, and labor is not required at the time of parts manufacture, assembly work, and recycling, and labor saving can be achieved. It becomes possible.

Further, when attaching the skin material 4e to the back inner shell 4a, it is only necessary to lock the hook 18 of the skin material 4e to the locking portion 10 of the back inner shell 4a, so that the mounting work can be easily performed. Therefore, it is possible to easily remove and reattach the skin material 4e at the time of cleaning or the like, and to improve work efficiency.
Further, since the hook 18 can be attached only by stitching it to the upper material 17, the number of processing steps for the skin material 4e can be further reduced.

  The chair back 4 in the present embodiment is configured such that each part can be easily attached and detached, so that the work efficiency can be improved in parts replacement such as assembly work and repair, and maintenance work is also easy. Can be. Furthermore, since each component is configured to be detachable, it can be easily disassembled for each component, and separation processing can be performed without trouble even when recycling.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and for example, the following modes can be employed.

  In the above embodiment, a chair used in a theater or the like has been described. However, as long as the back portion has the same configuration, the chair can be widely used in various types of chairs such as an office chair. Moreover, although the reinforcement body is attached to the back back shell, if a fitting part is provided in a back inner shell, you may attach a reinforcement body to a back inner shell. And although the metal square pipe material is employ | adopted for the reinforcement body, a metal round pipe may be sufficient and the thing of a material other than that may be employ | adopted as long as a load resistance can be ensured. Although the reinforcing body is processed into a U shape and attached to the back shell, a reinforcing body processed into an H shape or a R shape may be adopted as long as the load resistance can be secured. In addition, the mounting method when supporting and fixing the fixing plate, the reinforcing body, and the back shell is described as a method using a cylindrical nut, but it can be directly screwed into the reinforcing body and the back shell. good. The upper locking portions of the back inner shell and the back shell have a saddle shape, but the shape is not particular as long as the back inner shell and the back shell can be prevented from easily coming off. Furthermore, although the thing made from a polypropylene is employ | adopted for a back inner shell and a back back shell, the thing of another material may be employ | adopted if it has the same function.

It is a front view of the chair in one embodiment of the present invention. It is a side view of the chair in one embodiment of the present invention. (A) is the partial expansion perspective view of the chair in one Embodiment of this invention, (b) is sectional drawing which follows the AA line of Fig.3 (a). It is a perspective view of the back inner shell in one embodiment of the present invention. It is a perspective view of the back back shell in one Embodiment of this invention. It is the perspective view which attached the reinforcement body to the back back shell in one Embodiment of this invention. It is a partial expansion perspective view which shows the state which joined the back inner shell and back back shell in one Embodiment of this invention. It is a partial expansion perspective view of the back back shell upper part in one embodiment of the present invention. It is a fragmentary sectional view of the skin material in one embodiment of the present invention. It is a partial front view of the latching state of the skin material and back inner shell in one Embodiment of this invention. It is sectional drawing which follows the CC line of FIG. It is a perspective view of the frame of the conventional chair.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Leg part 2 ... Seat part 4 ... Back ridge part 4a ... Back inner shell 4b ... Back back shell 4c ... Reinforcement body 4d ... Cushion body 4e ... Epidermis Material 7 ... Headrest shell 10 ... Locking part 18 ... Hook

Claims (1)

The dorsal fin portion supported by the legs is divided into a resin back inner shell and a resin back shell,
A reinforcing body is detachably attached around the back shell,
The lower part of the reinforcing body is detachably attached to the leg part ,
The reinforcing body is made of a metal pipe material,
A headrest shell is integrally molded with the back inner shell .

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